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Subject: Re: Unusual error with \doifinstring in
 \startbtxrenderingdefinitions ... \stopbtxrenderingdefinitions
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Cc: Wolfgang Schuster <wolfgang.schuster.lists@gmail.com>
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Joey McCollum via ntg-context schrieb am 10.10.2021 um 05:42:
> The test using \removepunctuation that you provided does what it 
> should be doing (it produces 6 instances of "test-test" with the 
> intervening punctuation mark in each case removed), but it doesn't do 
> what I'm trying to do in the MWE above. I'm trying to take certain 
> punctuation marks that follow the \autopuncttest macro and place them 
> before it instead. Looking at the typo-chr .lua and .mkiv files, I see 
> that there are \pushpunctuation and \poppunctuationmethods in addition 
> to the \removepunctuation method. These might be useful for this 
> purpose, but in any case, I still have to check if the trailing 
> character is one of the characters in a specified set/string, and this 
> is where the error is arising.

Add \protected (or \unexpanded) to your command definition.

\startbtxrenderingdefinitions[myspec]
\protected\def\autopuncttest#1#2%
   {\removeunwantedspaces%
    \doifinstring{#2}{,.!?;:}{#2}%
    \footnote{#1}%
    \doifnotinstring{#2}{,.!?;:}{#2}}
\stopbtxrenderingdefinitions

Wolfgang


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<html theme="default-light" iconset="color"><head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head><body text="#000000"><span>Joey McCollum via ntg-context schrieb 
am 10.10.2021 um 05:42:</span><br>
<blockquote type="cite" 
cite="mid:CAGxRUG9q9M+2Of7rR5nf5ayxHKk5u1+VLOoV95-F3G+T6fWTKQ@mail.gmail.com">
  <meta http-equiv="content-type" content="text/html; charset=utf-8">
  <div dir="ltr">The test using \removepunctuation that you provided 
does what it should be doing (it produces 6 instances of "test-test" 
with the intervening punctuation mark in each case removed), but it 
doesn't do what I'm trying to do in the MWE above. I'm trying to take 
certain punctuation marks that follow the \a<span style="white-space:pre-wrap">utopuncttest macro and place them before it instead.

Looking at the typo-chr .lua and .mkiv files, I see that there are </span>\pushpunctuation
 and \poppunctuation<span style="white-space:pre-wrap"> methods in addition to the \removepunctuation method. These might be useful for this purpose, but in any case, I still have to check if the trailing character is one of the characters in a specified set/string, and this is where the error is arising.</span><br>
  </div>
</blockquote>
<br>
Add \protected (or \unexpanded) to your command definition.<br>
<br>
\startbtxrenderingdefinitions[myspec]<br>
\protected\def\autopuncttest#1#2%<br>
  {\removeunwantedspaces%<br>
   \doifinstring{#2}{,.!?;:}{#2}%<br>
   \footnote{#1}%<br>
   \doifnotinstring{#2}{,.!?;:}{#2}}<br>
\stopbtxrenderingdefinitions<br>
<br>
Wolfgang<br>
<br>
</body></html>

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